@bscotch/sprite-source/dist/checksum.js

Art pipeline scripting module for GameMaker sprites.

import { computePngChecksum } from '@bscotch/pixel-checksum';
import crypto from 'node:crypto';
import fsp from 'node:fs/promises';
/**
 * A quick checksum for arbitrary text-based file types
 * (like JSON or atlas), where newlines are first normalized.
 */
async function textFileChecksum(filePath) {
    const content = await fsp.readFile(filePath, 'utf8');
    const normalized = content.replace(/\r/g, '').trim();
    return computeStringChecksum(normalized);
}
export async function computeFileChecksum(filePath) {
    if (!filePath.match(/\.png$/i)) {
        return await textFileChecksum(filePath);
    }
    return computePngChecksum(filePath);
}
export async function computeFilesChecksum(paths) {
    const checksums = await Promise.all(paths.map(computeFileChecksum));
    return computeStringChecksum(checksums.join('-'));
}
export function computeStringChecksum(str) {
    const hash = crypto.createHash('md5');
    hash.update(str);
    return hash.digest('hex');
}
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